Solution
Solution
+1
Solution steps
Rewrite using trig identities
Use the following trivial identity
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Frequently Asked Questions (FAQ)
What is the value of cos((3pi)/5)cos((7pi}{30})-sin((3pi)/5)sin(\frac{7pi)/(30)) ?
The value of cos((3pi)/5)cos((7pi}{30})-sin((3pi)/5)sin(\frac{7pi)/(30)) is -(sqrt(3))/2